是否有可能得到PID的发射时间? [英] Is it possible to get the launch time of PID?
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问题描述
我有一个code是浮在这里一段时间(的code为我工作):
I have a code that is floating around here for a while (the code is working for me):
- (NSArray *) runningProcesses {
//CTL_KERN,KERN_PROC,KERN_PROC_ALL
int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL ,0};
size_t miblen = 4;
size_t size;
int st = sysctl(mib, miblen, NULL, &size, NULL, 0);
struct kinfo_proc * process = NULL;
struct kinfo_proc * newprocess = NULL;
do {
size += size / 10;
newprocess = realloc(process, size);
if (!newprocess) {
if (process) {
free(process);
process = NULL;
}
return nil;
}
process = newprocess;
st = sysctl(mib, miblen, process, &size, NULL, 0);
} while (st == -1 && errno == ENOMEM);
if (st == 0) {
if (size % sizeof(struct kinfo_proc) == 0) {
int nprocess = size / sizeof(struct kinfo_proc);
if (nprocess) {
NSMutableArray * array = [[NSMutableArray alloc] init];
for (int i = nprocess - 1; i >= 0; i--) {
NSString * processID = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pid];
NSString * processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];
NSString * proc_CPU = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_estcpu];
double t = [[NSDate date] timeIntervalSince1970] - process[i].kp_proc.p_un.__p_starttime.tv_sec;
NSString * proc_useTiem = [[NSString alloc] initWithFormat:@"%f",t];
// NSLog(@"process.kp_proc.p_stat = %c",process.kp_proc.p_stat);
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
[dic setValue:processID forKey:@"ProcessID"];
[dic setValue:processName forKey:@"ProcessName"];
[dic setValue:proc_CPU forKey:@"ProcessCPU"];
[dic setValue:proc_useTiem forKey:@"ProcessUseTime"];
[array addObject:dic];
}
free(process);
process = NULL;
NSLog(@"runningProcesses is === %@",array);
return array;
}
}
}
return nil;
}
我不是一个C语言的开发人员,所以我试着读了一下关于PID的等,但我的问题还没有看到一个办法知道当PID首次推出,上一次使用。
I'm not a C language developer so I tried to read a bit the questions regarding PID's etc but I haven't seen a way to know when a PID first time launched and used last time.
任何想法怎么办呢?
推荐答案
看起来你想要的是:
process[i].kp_proc.p_un.__p_starttime.tv_sec
这让你在几秒钟的过程一辈子的日期,你可以从制定开始时间。
That gives you the process lifetime to date in seconds, and you can work out the start time from that.
本code搞乱不知道C的不会是任何乐趣可言,虽然。
Messing with this code without knowing C is not going to be any fun at all, though.
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